Lynx Smart BMS 7.3. BMS operating modes The BMS in the Lynx Smart BMS communicates with the batteries and will safeguard them against low or high cell voltage as well as low or high temperatures. Such events are reported by the battery to the Lynx Smart BMS to take necessary action by turning off loads and/or inverter/chargers and chargers and either turning the Lynx Smart BMS off or on again, fully automatically or manually. The Lynx Smart BMS has 3 modes of operation: ON This is the normal operating mode. All interfaces are operational, and the contactor is closed.
If the Lynx Smart BMS was off due to low cell voltage or low SoC shutdown, it will exit OFF mode and return to ON mode when it detects a charging voltage >11.7V (>23.4V for a 24V system or >46.8V for a 48V system) than the battery voltage on the system side or when all cell voltages are higher than 3.2 V in case of a low cell voltage shutdown or when all cell voltages are higher than 3.37V in case of a low SoC shutdown or when it is turned back on via the Remote on/off switch or when it is turned back on via the VictronConnect app. The mode is also ON for a duration of 5 minutes with no charge voltage supplied when a Low Cell Voltage alarm was issued. OFF Lowest power mode.
All interfaces are off, and the contactor is opened. This mode is used to prevent damaging batteries by draining them too low. OFF is the mode the LSB will enter when using the Remote on/off switch or the soft switch in the VictronConnect app. The Lynx Smart BMS will also switch to OFF mode with a 5 minute delay if: one or more cells fall below 2.8V (adjustable in the battery) and no charge voltage has been detected during this time to prevent further discharge or when the set discharge floor [17] is reached and by then no sufficient charging voltage has been detected on the system side of the BMS.
Standby The Lynx Smart BMS can be put into Standby mode via the soft switch in the VictronConnect app or via the GX device and is used when the boat is docked or the RV is parked to prevent accidental discharging and charging from sources on the system side. All systems will be shut down, except for equipment powered by the AUX power port from which we recommend for powering the GX device. This mode is not intended to be used when the boat or RV is in storage for a longer period. Therefore, when a low cell voltage or low SoC (as determined by the discharge floor setting in the BMS) is detected, the Lynx Smart BMS will automatically switch to OFF mode to prevent further battery discharge.
The basic requirement for the soft switch to work in VictronConnect or in the GX device is that the contact between pins 10 and 11 of the multi connector is bridged with either a wire loop or a remote on/off switch. See below tables for an overview of all 3 operating modes, how to switch them manually and the status of the interfaces: Lynx Smart BMS device modes and status of the interfaces Commissioning and Operation of the Lynx Smart BMS Page 23 Mode Main contactor ATC ATD AUX power output VE.Can port Bluetooth Intended use On Closed On On Powered Functional On Normal operating mode. All interfaces are operational.
Standby Open Off Off Powered Functional On All systems will be shut down, except for equipment powered by the AUX power port from which we recommend for powering the GX device. Off Open Off Off Off Off On Lowest power mode. All interfaces are off, and the contactor is opened.